Spring Boot 找不到新类

Question

我有一个 Spring Boot 应用程序，并带有一个控制器类、一个模型类等。每当我想添加任何新类时，我们就说模型类。我可以在 IDE 中找到它并在其他类中导入它。但是当我构建应用程序时，我收到编译错误，提示找不到该类。

我已尝试清理项目、使缓存无效并重新启动等等。当我查看 bin 文件夹时，那里缺少我的新模型类。所以由于某种原因，它没有被添加到那里。它是一个带有 Gradle 的 Spring Boot 应用程序。我会很感激任何帮助，因为我是 Spring Boot 的新手，我必须维护这个项目。

java.lang.IllegalStateException: Unable to load cache item
        at org.springframework.cglib.core.internal.LoadingCache.createEntry(LoadingCache.java:79) ~[spring-core-5.3.13.jar:5.3.13]
        at org.springframework.cglib.core.internal.LoadingCache.get(LoadingCache.java:34) ~[spring-core-5.3.13.jar:5.3.13]
        at org.springframework.cglib.core.AbstractClassGenerator$ClassLoaderData.get(AbstractClassGenerator.java:134) ~[spring-core-5.3.13.jar:5.3.13]
        at org.springframework.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:319) ~[spring-core-5.3.13.jar:5.3.13]
        at org.springframework.cglib.proxy.Enhancer.createHelper(Enhancer.java:572) ~[spring-core-5.3.13.jar:5.3.13]
        at org.springframework.cglib.proxy.Enhancer.createClass(Enhancer.java:419) ~[spring-core-5.3.13.jar:5.3.13]
        at org.springframework.context.annotation.ConfigurationClassEnhancer.createClass(ConfigurationClassEnhancer.java:137) ~[spring-context-5.3.13.jar:5.3.13]
        at org.springframework.context.annotation.ConfigurationClassEnhancer.enhance(ConfigurationClassEnhancer.java:109) ~[spring-context-5.3.13.jar:5.3.13]
        at org.springframework.context.annotation.ConfigurationClassPostProcessor.enhanceConfigurationClasses(ConfigurationClassPostProcessor.java:447) ~[spring-context-5.3.13.jar:5.3.13]
        at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanFactory(ConfigurationClassPostProcessor.java:268) ~[spring-context-5.3.13.jar:5.3.13]
        at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:325) ~[spring-context-5.3.13.jar:5.3.13]
        at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:147) ~[spring-context-5.3.13.jar:5.3.13]
        at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:746) ~[spring-context-5.3.13.jar:5.3.13]
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:564) ~[spring-context-5.3.13.jar:5.3.13]
        at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:145) ~[spring-boot-2.6.1.jar:2.6.1]
        at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:730) ~[spring-boot-2.6.1.jar:2.6.1]
        at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:412) ~[spring-boot-2.6.1.jar:2.6.1]
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:302) ~[spring-boot-2.6.1.jar:2.6.1]
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:1301) ~[spring-boot-2.6.1.jar:2.6.1]
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:1290) ~[spring-boot-2.6.1.jar:2.6.1]
        at io.myproject.service.ServiceApplicationKt.main(ServiceApplication.kt:42) ~[main/:na]
Caused by: java.lang.NoClassDefFoundError: io/myproject/service/domain/model/Store
        at java.base/java.lang.Class.getDeclaredMethods0(Native Method) ~[na:na]
        at java.base/java.lang.Class.privateGetDeclaredMethods(Class.java:3166) ~[na:na]
        at java.base/java.lang.Class.getDeclaredMethods(Class.java:2309) ~[na:na]
        at org.springframework.cglib.core.ReflectUtils.addAllMethods(ReflectUtils.java:448) ~[spring-core-5.3.13.jar:5.3.13]
        at org.springframework.cglib.proxy.Enhancer.getMethods(Enhancer.java:635) ~[spring-core-5.3.13.jar:5.3.13]
        at org.springframework.cglib.proxy.Enhancer.generateClass(Enhancer.java:670) ~[spring-core-5.3.13.jar:5.3.13]
        at org.springframework.cglib.transform.TransformingClassGenerator.generateClass(TransformingClassGenerator.java:33) ~[spring-core-5.3.13.jar:5.3.13]
        at org.springframework.cglib.core.DefaultGeneratorStrategy.generate(DefaultGeneratorStrategy.java:25) ~[spring-core-5.3.13.jar:5.3.13]
        at org.springframework.cglib.core.ClassLoaderAwareGeneratorStrategy.generate(ClassLoaderAwareGeneratorStrategy.java:57) ~[spring-core-5.3.13.jar:5.3.13]
        at org.springframework.cglib.core.AbstractClassGenerator.generate(AbstractClassGenerator.java:358) ~[spring-core-5.3.13.jar:5.3.13]
        at org.springframework.cglib.proxy.Enhancer.generate(Enhancer.java:585) ~[spring-core-5.3.13.jar:5.3.13]
        at org.springframework.cglib.core.AbstractClassGenerator$ClassLoaderData$3.apply(AbstractClassGenerator.java:110) ~[spring-core-5.3.13.jar:5.3.13]
        at org.springframework.cglib.core.AbstractClassGenerator$ClassLoaderData$3.apply(AbstractClassGenerator.java:108) ~[spring-core-5.3.13.jar:5.3.13]
        at org.springframework.cglib.core.internal.LoadingCache$2.call(LoadingCache.java:54) ~[spring-core-5.3.13.jar:5.3.13]
        at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) ~[na:na]
        at org.springframework.cglib.core.internal.LoadingCache.createEntry(LoadingCache.java:61) ~[spring-core-5.3.13.jar:5.3.13]
        ... 20 common frames omitted
Caused by: java.lang.ClassNotFoundException: io.myproject.service.domain.model.Store
        at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581) ~[na:na]
        at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178) ~[na:na]
        at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522) ~[na:na]
        ... 36 common frames omitted

Answer 1

好的，我找到了解决问题的方法。我的项目在 Kotlin 中，我的新模型类在 Java 中。我认为混合它们是可以的，但事实证明我必须在 build.gradle.kt 中指定我的 java 类将在哪里。

将此添加到您的 build.gradle.kt

configure<SourceSetContainer> {
    named("main") {
        java.srcDir("src/main/kotlin")
    }
}